Process for covering thin articles with pyroxylin compounds.



E. J. KOONTZ. PROCESS FOR COVERING THIN ARTICLES WITH PYROXYI.

APPLICATION FILED JAN-20, 1915.

IN COMPOUNDS.

1,148,908, Patented Aug. 3, 1915.

PRINT csmlzmvonamlua CrimEmomCzLwLmd C'E'LLULOID CEMENT-DRIED r tweeter snwrn JAY Koon rz, or wanswonrn, cine.

rnocnss non covnnme THIN ARTICLES wr'rn PYBOXYLIN coiaronnns.

intense,

Specification of Letters Patent.

Application filed January 20, 1915. Serial No. 3,313.

T aZZ whom it may concern:

Be it known that I, EDWIN JAY KooN'rz,

' a citizen of the United States, residing at Wadsworth, inithe county of Medina and thin articles of wood can be covered'with a pyroxylin compound without warping and distorting the article. Briefly, this invention 1 has no relation to the'covering of wood articles of such thicknesses to b6 stable against warping or distorting when covered with apyroxyhn compound.

This'process is designed solely for covering of thin pieces ofwo'od, su'clrfor in-v stance as hand mirrors, where's. recess is provided in one of the faces thereof, to re,- ceive the mirror, which renders the wood so thin as to be insuificient to resist warping and distortion due to the pulling andcontracting in the hardening, drying and setting of the pyroxylin co 1 np un'd.- The man.'--;

which 1s to be applied to the article is covufacture of thin articles covered with p roxyli'n has heretofore been attended with great expense, due to'the necesslty of providing separate molds for molding theseparate sizes and shapes made, 1E2: erience has shown that when the ,softene pyroxylin compound is applied to thewrm da sweating, so called, is produced, which moisture entering the wood causes it to warp as. the

' pyroxylin and wood dry.

The primary ob'ect therefore of this invention is to provide a process by which thin bodies of wood can be covered with a pyroxylin compound without warping or distorting the wood and without the necesslty of using molds. v

The drawing presentedis a fragmentary view of a hand mirror which will serve. to

illustrate the, application of the process -which formsthe basis of this invention, but

it-is to beiunderstood thatwhile the illustration shows a portion of a hand mirror, which has been selected simply as a convenient ar- It is to be understood that the invention applies to the covering of any article of Patented ring, 3, 1915;,

wood which istoo thin to successfully re=- I sist distortion or warping following the cov erlng thereof by a coat of pyroxylin cornpound.

The first step in the process, and which while exceedingly usefuh is not absolutely i essential, is to coat thearticle, hereinafter -layer of fiat white paint 2, This layer of paint is used to cover the grain of the'wood as the covering layer er the pyrozylin compound is usually th-ingthis malres'the cov ering of the article white and, opaque vto prevent the wood itself showing through the semi-transparent pyroxyli'n covering. The layer of paint-is allowed to dry after which "the painted article is covered with a thick layer 3 of cement containing amyl acetate, pyroxylin-scrap and gum camphor, the proportions of which will vary somewhat with denominated as a mirror. frame 1, with a i respect to different articles to be covered,

and also will vary for other purposes not 'deemed necessary-to amplify here. This layer of cement is allowed to thoroughly dry and the wood article is then ready to receive the covering of pyroxylin sheeting. The pyroxylin sheeting first softened in ;v-' the usual manner and the face of thesheet firmly into shape, all bubbles and irregu-- larities smoothed out and the composite article permitted to dry, after which the roughness due to edge joints, etc, are dressed down and the article is ready for use. 4

From an extended experience in connection with the application of this process, it is found that the initial coating of the wood article by the amyl-acetate cement and then permitting the same to dry, effectually prevents the moisture from the softened pyroxylin sheeting and the cement used to cause the pyroxylin sheeting to adhere to the wood, from penetrating the latter, thereby preventing said moisture from entering the wood and no warping or distorting of the article takes place.

The necessity for the initial coat, of fiat white paint does not arisewhere thepyroxylin sheeting is opaque and which prevents the wood showing through the pyroxylin sheeting and it is only used to give a finished appearance to the article. The article may be covered equally well and equally ad:-

vantageously and the same results may be obtainediithe articleis first covered with a solution of the amyl-acetate cement. I claim 2- 1.; That improvement in methods for covering relatively thin and unsupported Wooden articles with apyroxylin compound which consists in coating the article with a cement containing 'amyl-acetate, pyroxylin-scrap and gum-camphor, drying the same, re-coating the coated article With a similar solution, coating a previously softened sheet of pyroxylin compound with the same solution and then applying the coated face of the pyroxylin compound tothe coated face of the article and shaping the same, then drying the composite article.

2. That improvement in methods for coating relatively thin and unsupported wooden ERNEST J. SLUTER, MYRTLE KOONTZ. 

